northythm, I couldn't reproduce this issue here.Can you confirm that the sound from drums placed on your left comes predominantly from the right earbud of your headphones? (You can try the cross stick on one of the big kits or place a drum even further left if needed).

But when auto panning a preset kit I get different results. For example auto panning the big rock kit, the ride bell and other cymbals sound reversed. I exported a waveform and it also looks like more volume from the left on the ride bell when it is placed more to the right. The two large hits in the graphic are also look and sound reversed.